Checking Procedure Before The Test Run - Hitachi YUTAKI Series Service Manual

6.1. CHECKInG ProCEdUrE BEforE THE TEST rUn

When you have finished the installation, perform the test run according to the following procedure. After performing the test
run, hand over the system to the customer.
- Perform the test run of the Yutaki one by one.
- Make sure that the electrical wiring and the refrigerant piping are correctly connected.
- You should perform the test run according to the "Test Run Procedure for Yutaki" on the next pages.

- Electrical hazard. Risk of death. Do not push the button of the magnetic switch(es). If you do so, you will cause
a serious accident.

- Several dangers. Can cause injuries or malfunction. Do not operate the system until all the check points have
been cleared.
- Measure the resistance between the ground and the terminal of the electrical components. Make sure that
the electrical resistance is more than 1 MΩ. Otherwise, do not operate the system until you find the electrical
leakage and you repair it. Do not impress the voltage on the terminals for transmission 1 and 2.
- Make sure that the terminals for the power supply wiring ("L1" to "L1", "L2" to "L2" , "L3" to "L3" and "N"
to "N" of each terminal board for AC230V or AC400V match correctly. Otherwise, you may damage some
components.
- Make sure that the stop valves of the Yutaki are fully open. Then, start the system.
- Make sure that the switch on the main power source has been ON for more than twelve hours in order to
warm the compressor oil by the oil heater. The operation is not available within 4 hours after turning ON the
power supply.
- Pay attention to the following items while the system is running:
- Do not touch any of the parts at the discharge gas side with your hands because the compressor chamber
and the pipes at the discharge gas side are hot at a temperature that is higher than 90°C.
- Do not touch any electrical components for more than three minutes after turning OFF the main switch. Make
sure that the stop valve of the gas line and the stop valve of the liquid line are fully open.
• Checking procedure
1. Make sure that the stop valve of the gas line and the stop valve of the liquid line are fully open.
2. Make sure that there is no refrigerant leakage. (The flare nuts sometimes loosen because of the vibration during the
transportation).
3. Make sure that the switch on the main power source has been ON for more than twelve hours in order to warm the
compressor oil by means of the oil heater.
4. Check whether or not the electrical wiring of the Yutaki is connected as shown in chapter "3" Electrical Wiring.
5. Make sure that each wire terminal is correctly connected at the power source.

- Make sure that the field-supplied electrical components (main switch fuse, fuse-free breaker, earth leakage
breaker, wires and terminals) have been properly selected according to the electrical data in the technical
catalog of the unit. Also, make sure that the field-supplied electrical components comply with both national and
local codes.
- Use the shielded cables for the field wiring in order to avoid electrical noise. (The length of the shielded cable
should be less than 1000m. The size of shielded cable should comply with local codes.)
SMGB0066 rev.0 - 12/2009
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Checking procedure before the test run
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Test run
Service Manual